Great Southern 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
25
26
27
28
29
low
30
31
Feb 1
low
2
3
low
4
5
6
low
7
med
8
med
9
low
10
11
12
13
14
15
16
low
17
med
18
low
19
low
20
low
21
low
Chance of rainfall within district
nil
< 25%
low
25% to 50%
med
50% to 75%
high
≥ 75%

Issue Notes

The hemispheric long wave pattern has remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, New Zealand, the south Pacific, the southeast Pacific, and South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 3 February to 7 February, 7 February to 11 February, and 18 February to 22 February. Rain events originating in the tropics and moving south are possible about 29 January to 2 February, 11 February to 15 February, and 26 February to 2 March.
Over Western Australia the strongest cold fronts should occur about 3 February to 7 February, 8 February to 12 February, and 18 February to 22 February.

Issued Jan 24

Forecast Explanation

This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

Site search


Enter a postcode or town name for local weather, or text to search the site. » advanced search

Hottest start to year in decades for west coast

14:51 AEDT Perth days for the first half of January are averaging the hottest since 1962.  Only two days this month so far have stayed below 30 degrees - and then barely - pushing the average maximum for the month so far up to 33.6 degrees, 2.5 degrees above average.

Help with Farmonline Weather